diff --git a/archimedes.gemspec b/archimedes.gemspec
index 2d8caef..975244d 100644
--- a/archimedes.gemspec
+++ b/archimedes.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler', '~> 1.3'
+  spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'mocha', '~> 0.14.0'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rspec', '~> 2.14.1'